Microsoft Windows Server 2003 Service Pack 2 (SP2) is a cumulative service pack that includes the latest updates and provides enhancements to security and stability. In addition, it adds new features and updates to existing Windows Server 2003 features and utilities.
List of Fixes
Download Page (x86)
Download Page (x64)
Download Page for Itanium
edit: updated to include x64 and download Itanium links